Simons Rear Silencer – BMW 5 Series [E60/E61] sedan/touring 2003-2010

Simons is a Danish exhaust maker founded in 1960. Its range here has two sides: complete cat-back systems, including Duplex twin-pipe versions and rear silencers, and the parts for building or repairing an exhaust yourself.

The building parts come in stainless steel or mild steel across a range of diameters: bends up to 180 degrees, straight pipes and tailpipes, oval and round silencers, flexible sections, Y-pieces, reducers, fitting sleeves, flanges and gaskets.

Each cat-back title gives the model, body style and years the system was made for, so check those against your car first.

What sets Simons apart from the other exhaust brands on TrackToolFactory is the choice of material. Most of the loose pipework here is stainless only, while Simons offers the same bends, pipes and silencers in mild steel as well. Mild steel is easy to cut and weld when a system is still being developed; stainless steel resists corrosion for longer once the layout is settled.